fixed bug #1115825 - install pg/Show details/rt clk popup not destroyed on finish

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@4819 212acab6-be3b-0410-9dea-997c60f758d6

Source/exehead/Ui.c

@@ -1648,7 +1648,7 @@ static BOOL CALLBACK InstProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lPa
         TPM_NONOTIFY|TPM_RETURNCMD,
         pt.x,
         pt.y,
-        0,linsthwnd,0))
+        0,hwndDlg,0))
       {
         int i,total = 1; // 1 for the null char
         LVITEM item;